Subclasses Each main class is divided into subclasses, which contain further subsections when necessary, according to historical period, place, technique, material etc.

Subsections referring to period and place are mainly used in history, for example in the history of art and industrial arts, cultural history etc.

Historical period is indicated after the main class by a number with a preceding point: .1 Prehistoric Times .2 Ancient Times .3 Middle Ages .4 Early Modern Age to c. 1870 .5 Late Modern Age from c. 1870

Examples: 03 General History of Art 03.1 Art History: Prehistoric Times 03.2 Art History: Ancient Times

Historical period can be further specified by the trends of western art history: 18 Painting 18.4 Painting: Early Modern Age to c. 1870 18.41 Painting: Renaissance

The number after the point can also denote subsections other than historical period: 35 Textile Design. History. 35.1 Weavings 35.2 Tapestries. Gobelin Tapestries. 35.3 Carpets. Rugs.

Place is indicated by a number in parentheses after the main class: (0) Finland (1) Scandinavia (3) Near and Middle East (4) Far East (5) Africa (6) America: Pre-Columbian Art (7) Australia and Oceania

Examples: 03 General History of Art 03(0) Art History (Finland) 03(5) Art History (Africa)

10.5 Visual Arts: Late Modern Age from c. 1870 New Tendencies in Visual Arts 10.52 Visual Arts (according to artists). 10.9 Visual Arts: Techniques and Materials - see also Drawing 14.9 - see also Graphic Art 15.9 - see also Sculpture 16.9 - see also Painting 18.9

11 Mosaic.

12 Stained Glass.

13 Iconography.

14 Drawing.14.9 Drawing: Techniques and Materials - see also Drawing and Art Teaching 02.1 - anatomy and anatomy for artists see 69.1

70.9 Industry.History of Industry and Manufacturing Establishments.- history of industrial design see 31.5- industrial arts: industry and manufacturing establishments see the class in question e.g. textiles 35.9, glass 37- company organization see 79

71 Ergonomics.Research Studies on Technical Working Methods,Equipment, and Working Environment. - occupational health and safety, research studies on working conditions see 87.52

87.32 Higher Education. Universities. University Studies. Methods of Research (General Guides) - University of Industrial Arts Helsinki see 87.321 - other schools, colleges and universities of art see 87.322

87.322 Schools, Colleges and Universities of Art. History. Organization. Operations. Annual Reports. - University of Industrial Arts Helsinki see 87.321 - theory of teaching see the class in question